I took mine out when I first found out I was pregnant cause I was going to try and breastfeed. Everything worked fine! I was kinda of afraid that it would shoot out in 3 different places but it didn't.

The only thing i've heard of is that because of the scar tissue around the periecing it will block some ducts. I'm not sure if that puts you at increased risk for blocked ducts, mastitis (infection in the breast/milk ducts) or they simply dry up.

You can keep the piercings in during pregnancy. It won't have any effect on breastfeeding, but you have to take the hoop out each time you nurse because if it came loose it could cause a choking hazard, but you can put the hoop right back in afterwards. I had no problem with mine, and I had both pierced.